Detachable pin for firearms



Aug. 9, 1949.

J. CAMPBELL, JR

DETACHABLE PIN FOR FIREARMS Filed June 4, 1948 James Campbell, Jr.

IN VENTOR.

Patented Aug. 9, 1949 UNETED S T TES 2 Claims.

This invention relates to new and useful improvements in firearms and the primary object of the present invention is to provide novel and improved means for detachably securing the floor plate of a gun relative to the magazine thereof so that the shells within the magazine may be quickly and readily removed therefrom in a convenient manner.

Another important object of the present invention is to provide a detachable pin for retaining the floor plate of a gun relative to the magazine thereof including novel and improved means for locking the pin relative to the gun.

A further object of the present invention is to provide a replacement for the usual floor plate holding pin of a gun that is employed for detachably securing the holding pin to the gun and which is removably secured to the floor plate.

A still further aim of the present invention is to provide a detachable pin for firearms that is simple and practical in construction, strong and reliable in use, small and compact in structure, relatively inexpensive to manufacture, and otherwise well adapted for the purposes for which the same is intended.

Other objects and advantages reside in the details of construction and operation as more fully hereinafter described and claimed, reference being had to the accompanying drawings forming part hereof, wherein like numerals refer to like parts throughout, and in which:

Figure 1 is a fragmentary longitudinal vertical sectional view of a gun and showing the present invention applied thereto;

Figure 2 is a perspective view of the present invention per se; and,

Figure 3 is a perspective view of the resilient ring used in conjunction with the present invention.

Referring now to the drawings in detail, wherein for the purpose of illustration, there is disclosed a preferred embodiment of the present invention, the numeral I represents a gun or firearm having a magazine [2 the lower open end of which is closed by a floor plate I4 having an opening it.

Integrally formed with the floor plate 14 is a sleeve i8 that communicates with the opening l6 and which is positioned an annular recess 20 provided in the gun at the lower end of a seat or pin chamber 22 that forms an integral part of the magazine.

Normally, a pin (not shown) is used to secure the floor plate M to the chamber 22 so that the said floor plate will close the lower open end of the magazine.

The present invention does not attempt to claim the above conventional structure but is merely a replacement for the aforementioned pin whereby the floor plate may be quickly and readily removed to facilitate a convenient removal of the shells in the magazine without having to eject the shells separately with the bolt.

To accomplish the above desired results, there is provided a holding member that is designated generally by the numeral 24. This holding member 24 includes a cylindrical shank portion 26 having a reduced end portion 28 and a head portion 30 the outer edge 32 of which is knurled to permit a desirable handling of the same.

An annular groove 34 is provided in the shank 26 adjacent the end portion 28 and communicates with a notch 36 provided in the shank 26 for a purpose which Will later be more fully apparent.

Another annular groove or recess 38 is provided in the shank 26 adjacent the head 36 and receives a resilient, split ring 40.

In practical use of the present invention, the shank 26 is inserted upwardly through the opening l6 and into the seat or chamber 22 with the reduced end 28 of the shank 26 received in an opening 42 in the upper end of the seat 22.

The notch 36 slides past a protuberance or locking pin 44 provided in the seat so that the said pin 44 may be disposed in the groove or recess 34 whereupon the shank 26 is rotated slightly.

A coil spring 46 embraces the reduced portion 28 and is braced between the upper end of the seat 22 and an annular shoulder 48 on the shank 25 to urge the member 26 downwardly for yieldingly retaining the pin 44 in the groove 34.

As the member 24 is pulled outwardly, the split ring 40 engages the inner surface of the sleeve l8 to retain the member 24 relative to the floor plate l4.

In view of the foregoing description taken in conjunction with the accompanying drawings it is believed that a clear understanding of the construction, operation and advantages of the device will be quite apparent to those skilled in this art.

A more detailed description is accordingly deemed unnecessary.

It is to be understood, however, that even though there is herein shown and described a preferred embodiment of the invention the same is susceptible to certain changes fully comprehended by the spirit of the invention as herein described and the scope of the appended claims.

Having described the invention, what is claimed as new is:

1. In a firearm having a magazine, a floor plate forming a closure for the magazine, and a pin seat adjacent said magazine, said floor plate having an opening communicating with said seat; means detachably securing said floor plate relative to said magazine comprising, a cylindrical holding member extending through the opening in said floor plate and received in said seat, said holding member having a reduced end portion, said holding member having a head portion engaging said floor plate, an annular recess provided in said holding member adjacent the reduced end thereof, a notch in said holding member communicating with said recess, a protuberance in said seat and received in said recess, an

annular groove provided in said holding member,

4 and a split ring positioned in said groove for re taimng said holding member relative to said floor plate.

2. The combination of claim 1 and a spring 5 mounted in said seat and acting on said holding member to yieldingly retain said protuberance in said recess.

JAMES CAMPBELL, JR.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 527,869 Mauser Oct. 23, 1894 1,172,069 Stamm Feb. 15, 1916 1,178,468 Hartigan Apr. 4, 1916 1,446,763 Nelson Feb. 27, 1923 '2 2,132,148 Davis Oct, 4, 1938 r 2,317,889 Danneman Apr. 27, 1943 FOREIGN PATENTS Number Country Date Great Britain 1909 

